Mr Stacky Blocks 5KGB Coco Coir Peat Block Perfect multipurpose growing media for horticulture, floriculture, & worm bedding After adding water block expands to approximately 20 Gallons (75 Liters) - Video Instructions Available - 8:1 Compression Ratio Mix with soil or use by itself to water less and keep roots aerated - High water holding/retention capacity and high air filled porosity ideal for roots - Very Low Salt Content (Very Important When Choosing Coir) Stores and releases nutrients over extended periods of time. Snail Repellent Grown In FRESH Water & Washed with FRESH Water - Very Important To Keep The Salts Low For Plant Health - Know how your Coco is made